I wanted to try an inexpensive platform for drone experimentation with APM 2.5, and I found that a plywood frame was suitable for my purposes.
Here is the part list:
Total weight: about 1.5 Kg with 3000mAh 4S1P
I have a lot of free space on the frame and I can use it for video link devices and so on.
The quadcopter is pretty stable also in auto mode, and the motors-propellers system is quite efficient.
with 3000mAh 4S1P: 16 min
with 3000mAh 3S1P: 12 min
with 2200mAh 3S1P: 9 min
Please tell me your thoughts.